US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter V — NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 537 — AUTOMOTIVE FUEL ECONOMY REPORTS537.349 C.F.R. § 537.3Applicability.Last amended: 2024Year: 2026Length: 26 wordsOfficial source Cite as 49 C.F.R. § 537.3 (2026)This part applies to automobile manufacturers, except for manufacturers subject to an alternate fuel economy standard under 49 U.S.C. 32902(d). [89 FR 52953, June 24, 2024]Cross-references to the US Code49:32902Previous49 C.F.R. § 537.2Next49 C.F.R. § 537.4